Tennis ball puzzle

-------------- --------------- ---------------| | | | | || | | | | || YELLOW | | WHITE | | WHITE || TENNIS | | TENNIS | | & YELLOW || BALLS | | BALLS | | TENNIS || | | | | BALLS || | | | | |-------------- --------------- ---------------The other day Grand Slam Cooper, proprietor of the Hit & Miss Sport Shop, was checking out a new shipment of tennis balls when he noticed that each of the three crates was mislabelled. Being a puzzler of great renown he came up with a problem that has stumped everyone so far. it goes like this : Take one tennis ball out of any of the three crates without looking into the crate or into any of the other crates. With only the color of the one tennis ball to guide you, correctly label each of the crates.

See if you can net the answer in ten minutes. No overtime permitted.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.